www.pudn.com > vc-network-communication.rar > CodecMgr.cpp

//NetTalk 
/*------------------------------------------------------------------------------*\ 
 ============================= 
   模块名称: CodecMgr.cpp 
 ============================= 
  
 [版权] 
  
   2000-2002  115软件工厂  版权所有 
                                               
\*------------------------------------------------------------------------------*/ 
#include "WndX.h" 
 
#include "g729a.h" 
#include "UDPSocket.h" 
#include "AVIOMgr.h" 
#include "CodecMgr.h" 
 
/*------------------------------------------------------------------------------*/ 
 
 
CCodecMgr::CCodecMgr() 
{ 
	//VoiceAge g729a codec初始化 
	va_g729a_init_encoder(); 
	va_g729a_init_decoder(); 
	m_hIC=NULL; 
	 
	 
	m_cv.cbSize=sizeof(m_cv); 
	m_cv.dwFlags=ICMF_COMPVARS_VALID ; 
	m_cv.hic=m_hIC; 
	m_cv.fccType=ICTYPE_VIDEO ; 
	m_cv.fccHandler=859189837; 
	m_cv.lpbiOut=0; 
	m_cv.lKey=10; 
	m_cv.lDataRate=6; 
	m_cv.lQ=10000; 
//将视频格式固定（这是非常常用的格式，一般的视频捕捉设备应该会支持） 
	m_BmpU.bmiHeader.biSize=sizeof(BITMAPINFOHEADER); 
	m_BmpU.bmiHeader.biWidth=176; 
	m_BmpU.bmiHeader.biHeight=144; 
	m_BmpU.bmiHeader.biPlanes=1;	 
	m_BmpU.bmiHeader.biBitCount=24;	 
	m_BmpU.bmiHeader.biSizeImage=76032; 
	 
} 
/*------------------------------------------------------------------------------*/ 
CCodecMgr::~CCodecMgr() 
{ 
	DestroyCodecA(); 
	DestroyCodecV(); 
	 
} 
/*------------------------------------------------------------------------------*/ 
//初始化视频编码解码器 
BOOL CCodecMgr::InitCodecV() 
{ 
	 
	DestroyCodecV(); 
	BOOL bRet=FALSE; 
	// 
	m_hIC=ICOpen(ICTYPE_VIDEO,859189837,ICMODE_COMPRESS|ICMODE_DECOMPRESS); 
	if(!m_hIC) 
		goto RET; 
	 
	ICCompressGetFormat(m_hIC,&m_BmpU,&m_BmpC); 
	//微软的H.263 codec需要消息确认，得到这个不容易 
	ICSendMessage(m_hIC,0x60c9,0xf7329ace,0xacdeaea2); 
 
	m_cv.hic=m_hIC; 
	m_cv.dwFlags=ICMF_COMPVARS_VALID; 
	//star sequence of frames compression 
	if(!ICSeqCompressFrameStart(&m_cv,&m_BmpU)) 
		goto RET; 
	//star decompression; 
	if(ICDecompressBegin(m_hIC,&m_BmpC,&m_BmpU)!=ICERR_OK) 
		goto RET; 
 
	bRet=TRUE; 
	 
RET: 
	if(!bRet) 
		DestroyCodecV(); 
	return bRet; 
} 
 
/*------------------------------------------------------------------------------*/ 
void CCodecMgr::DestroyCodecV() 
{	 
	if(m_hIC) 
	{ 
		ICDecompressEnd(m_hIC); 
		ICSeqCompressFrameEnd(&m_cv); 
		ICCompressorFree(&m_cv); 
		ICClose(m_hIC); 
		m_hIC=NULL; 
	}	 
	 
} 
/*------------------------------------------------------------------------------*/ 
BOOL CCodecMgr::InitCodecA() 
{	 
	return TRUE; 
} 
/*------------------------------------------------------------------------------*/ 
void CCodecMgr::DestroyCodecA() 
{ 
	 
 
} 
/*------------------------------------------------------------------------------*/ 
//压缩音频帧 
BOOL CCodecMgr::EncodeAudioData(char *pin,int len,char* pout,int* lenr) 
{ 
	BOOL bRet=FALSE; 
	if(!pin||len!=SIZE_AUDIO_FRAME||!pout) 
		goto RET; 
	//encode the audio frames 
	va_g729a_encoder((short*)pin,(BYTE*)pout); 
	va_g729a_encoder((short*)(pin+160),(BYTE*)pout+10); 
	va_g729a_encoder((short*)(pin+320),(BYTE*)pout+20); 
	va_g729a_encoder((short*)(pin+480),(BYTE*)pout+30); 
	va_g729a_encoder((short*)(pin+640),(BYTE*)pout+40); 
	va_g729a_encoder((short*)(pin+800),(BYTE*)pout+50); 
 
	if(lenr) 
		*lenr=SIZE_AUDIO_PACKED; 
 
	bRet=TRUE; 
RET: 
	return bRet; 
} 
/*------------------------------------------------------------------------------*/ 
//解压缩音频帧 
BOOL CCodecMgr::DecodeAudioData(char *pin,int len,char* pout,int* lenr) 
{ 
	 
	BOOL bRet=FALSE; 
	if(!pin||len!=SIZE_AUDIO_PACKED||!pout) 
		goto RET; 
	//decode the audio frames 
	va_g729a_decoder((BYTE*)pin,(short*)(pout),0); 
	va_g729a_decoder((BYTE*)pin+10,(short*)(pout+160),0); 
	va_g729a_decoder((BYTE*)pin+20,(short*)(pout+320),0); 
	va_g729a_decoder((BYTE*)pin+30,(short*)(pout+480),0); 
	va_g729a_decoder((BYTE*)pin+40,(short*)(pout+640),0); 
	va_g729a_decoder((BYTE*)pin+50,(short*)(pout+800),0); 
 
	if(lenr) 
		*lenr=SIZE_AUDIO_FRAME; 
	 
	bRet=TRUE; 
RET: 
	return bRet;	 
} 
/*------------------------------------------------------------------------------*/ 
//解压缩视频帧 
BOOL CCodecMgr::DecodeVideoData(char *pin,int len,char* pout,int *lenr,DWORD flag) 
{ 
	 
	BOOL bRet=FALSE; 
	if(!pin||!pout||!m_hIC) 
		goto RET; 
	// 
	if(ICDecompress(m_hIC,flag,&m_BmpC.bmiHeader,pin,&m_BmpU.bmiHeader,pout)!=ICERR_OK) 
		goto RET; 
	 
	if(lenr) 
		*lenr=m_BmpU.bmiHeader.biSizeImage; 
	 
	bRet=TRUE; 
RET: 
	return bRet;	 
} 
/*------------------------------------------------------------------------------*/ 
//压缩视频帧 
BOOL CCodecMgr::EncodeVideoData(char* pin,int len,char* pout,int* lenr,BOOL* pKey) 
{ 
	 
	BOOL bRet=FALSE; 
	char*p; 
	long s=2000; 
	BOOL k; 
	if(!pin||!pout||len!=(int)m_BmpU.bmiHeader.biSizeImage||!m_hIC) 
		goto RET; 
	 
	p=(char*)ICSeqCompressFrame(&m_cv,0,pin,&k,&s); 
	if(!p) 
		goto RET; 
	if(lenr) 
		*lenr=s; 
	if(pKey) 
		*pKey=k; 
	if(s>MAX_UDP_SIZE-sizeof(PACK_VIDEO)) 
		goto RET; 
	 
	CopyMemory(pout,p,s); 
	bRet=TRUE; 
RET: 
	return bRet;	 
}